Attachment for phonographs.



J. GEORIGI. ATTACHMENT FOR PHONOGRAPHS.

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936,115. '7 Patented 0015.5,1909.

- 'unrran srarns PATENT onion.

.IOHN GEORIGI, F- PHILADELPHIA, PENNSYLVANIA.

ATTACHMENT Foa PHONOGRAPHS.

Specification of Letters Patent.

Patented Oct. 5, 1909.

Application filed November 7,1908. Serial No. 461,518.

to which it appertains to make and use the same.

The primary object of this invention is to provide a simple device forincreaslng the .volume of sound waves in reproducers of the uppercollector to a common the diaphragm talking machines. Ordinarily thesound waves are collected only from above the diaphragm from which thestylus is suspended, sound from beneath the diaphragm being lost. Bymeans 0" my invention the ordinary diaphragm and the sound wavecollector are inclosed in a casing havinga chamber for collecting thesound wavesfrom beneath the diaphragm and transferring themindependently of the sound waves of point where the (ZOHJOlIlt soundwaves of greatly increased volume may be transmitted through a tube orhorn.

A further object of my invention is to provide a device of thischaracter which may be applied to reproduoers 110w in general use.

The invention will be hereinafter fully set forth and particularlypointed out in the claims In the accompanying drawings, Figure l is avertical longitudinal sectional view. Fig. 2 is a plan View with the topand the ordinary reproducer removed. Fig. 3- is adetail. Fig. 4 shows aslight modification. Fig. 5 1s a plan view of the form shown in Fig. 4.with top removed. Fig. 6 1s an invrtcd fragmentary view of the top shownin Fig. 4.

Referring to the drawings, 1 designates the diaphragm of an ordinaryreproducer of the type employed in connection with the well-known Edisonphonograph. This diaphragm is covered by a sound wave collector 2 havinga ring 3 which encircles and extends beneath the diaphragm, [and alsohaving a tube-like extension4 towhich a flexible tube or a horn may besecured By this device all the sound waves from above formed betweenring 12 through the ordinary collector.

are collected.- Ordinarily v .1 thestylus arm is located immediately be-GEORIGI, of:

neath the diaphragm and at one end is connected to the latter at thecenter thereof.

According to my invention the reproducer as a whole is located Whollywithin a casing having a lower chamber 6 beneath the diaphra m and anupper chamber 7,- the two chain ers being in communication with eachother but not with the interior of the sound collector 2. This casing isshown in Fig.1

as being composed of a lower cup-like portion having a circumferentialring 8 of reater diameter than the ordinary reproducer, and an uppertop-piece 9 terminating in a tubular extension 10 which incloses thetubulancxtension of the ordinary re roducer. The latter is shown asfitted m a ring 12 having a series of peripheral lugs 13 which fit inseats in ring 8. It is held to reproducer 2 by screws 14. The spacesthus and ring 8 of the casing form passage-ways for the sound waves frombeneath the diaphragm to the top-piece of the casing. In this way thefull volume of sound waves produced by the vibratory action of thediaphragm is collected, the sound waves from beneath the j diaphragmbeing transferred to a point some distance above the diaphragm beforeintermingling with the sound waves collected The toppiece 1s shown inFig. l as being detachably held by retainers 15 secured to ring 8.

In the use of'my invention the stylus arm 16 is located beneath theinclosing casing, and is connected in the usual manner to the center ofthe diaphragm.

It is manifest that the inclosing casing may be constructed in anypreferred manner., For instance, the ring 8 instead of being formedintegral with the bottom member of the casing may be formedindependently thereof, as shown at 8 in Fig. 4, and it and the top-piecemay be held in place by the screws 17 passed through lugs 13. In thisform the lugs carrying screws 14 may be smaller and arranged mtermediatethe lugs 13*. Other chan es may be made without departing from the scopeof my invention.

To those-skilled in the art the advantages of my improvement will bereadily appreciated. It may be applied to ordinary reoroducers, of thetype now in general use, without necessitating any change in theconsound-waves from beneath said diaphragm Wa leadingfrom said chamberto and also an independent assageabout the point of discharge from thefirst mentionedsound collector.

2. The combination with a reproducer having a vibratory diaphragm, and asoundcollector for receiving all the -sound-waves from above'thediaphragm and discharging the same at a-certam point, of a casinginclosing such diaphragm and sound-collector and having a lowerchambered portion for collecting all'the sound-waves from beneath saiddiaphragm, and a top-piece extendin around said sound-collector, saidchambers portion'being in communication with said top-piece, whichlatter discharges the sound waves from the lower chamber upward beyondthe point of discharge from the first mentioned collector.

. 3. The combination with a reproducer having a vibratory diaphragm, anda soundcollector for receiving all the sound-waves from above thediaphragm and concentrating said sound waves at a single point, of acasing inclosing such diaphra m and soundcollector com risin a cham eredportion encircling sai diap ra m, a to piece above said sound-collector,said chain cred portion and top-piece being in communication outdiameterthan the 4. The combination with a reproducerc and an imperforate'sound-collector, of a ring secured to the ex-,

having a die ragm terior of said reproducer, a casing in which said ringis mounted having a chambered portion beneath said diaphragm, and atoppiece surrounding said sound-collector, said chambered portion beinin communication with said top-piece on t e outside of the re producer.I

5.. The combination with a reproducer having a vibrato diaphra m and asoundcollector for receivin all the sound waves from above the diapragm, said collector having a tubular extension, of a. casing inclosingsaid reproducer and having a chamber for collecting-all the sound-wavesfrom beneath said diaphragm, and a top-piece having a tubular extensionsurrounding the tubular extension of the sound-collector, said chamberand topiece being in communication with each otier. I

6. The combination with a reproducer having a diaphra in and asound-collector, of a ring secure to said reproducer and having a seriesof lugs rojecting therefrom, a casing having arin ike portion of greaterrst mentioned ring, a top-piece surrounding said sound-collector, andmeans for securing said top-piece.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

JOHN GEORIGI.

-Witnesses GODFREY S. Tnnismv, PATRICK J. OBnmn.

